Home / Standards / GB/T 22522 GB/T 22522 Active Metric series wires for measuring screw threads 测量螺纹用米制系列量针 Standard Type GBT ICS 17.040.30 CCS J42 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会